quantum key distribution what is it and why should you
play

Quantum Key Distribution - what is it and why should you care? - PowerPoint PPT Presentation

Jan 01, 2023 •600 likes •1k views

Quantum Key Distribution - what is it and why should you care? Thomas Walther Laser and Quantum Optics TU Darmstadt September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | 1 Physics in 1900 Classical Mechanics

  1. Quantum Key Distribution - what is it and why should you care? Thomas Walther Laser and Quantum Optics TU Darmstadt September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 1

  2. Physics in 1900 Classical Mechanics Translation, Rotation, Pendulum, Planetary Motion, Gravity, Newton, Kepler, Copernikus, Galilei, … Newton Boltzmann Kinetic Gas Theory Explanation of Heat with Elements of Classical Mechanics Electric and Magnetic Phenomena Electric Fields, Magnetic Fields, Current, Charge, Induction Faraday Maxwell Faraday, Maxwell, Hertz, Gauss, Ampere, Volta u.a. September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 2

  3. Physics in 1900 § General opinion § Basic theories known § Only few missing pieces § more experiments will fill voids Blackbody Radiation September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 3

  4. Historical Overview Year Theory Experiment 1885 Balmer Series 1900 Quantization Hypothesis (Planck) 1902 Experiments Photo effect (Lenard) 1905 Photo effect (Einstein) 1909 Single Photon Experiments (Taylor) 1911 Cloud chamber 1913 Atomic modell (Bohr) 1914 Franck-Hertz Experiment 1916 Atomic model (Sommerfeld) 1921 Stern-Gerlach Experiment 1922 Compton effect 1924 Wave character of matter (deBroglie) 1925 Spin, Formulations of QM by Schrödinger, Heisenberg, Dirac 1926 Schrödinger Equation Electron interference 1935 Entanglement, Einstein-Podolsky-Rosen-Paradox Discovery of the Neutron September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 4

  5. Historical Overview Year Theory Experiment 1885 Balmer Series 1900 Quantization Hypothesis (Planck) 1902 Experiments Photo effect (Lenard) 1905 Photo effect (Einstein) 1909 Single Photon Experiments (Taylor) 1911 Cloud chamber 1913 Atomic modell (Bohr) 1914 Franck-Hertz Experiment 1916 Atomic model (Sommerfeld) 1921 Stern-Gerlach Experiment 1922 Compton effect 1924 Wave character of matter (deBroglie) 1925 Spin, Formulations of QM by Schrödinger, Heisenberg, Dirac 1926 Schrödinger Equation Electron interference 1935 Entanglement, Einstein-Podolsky-Rosen-Paradox Discovery of the Neutron September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 4

  6. Quantum Physics: Interaction of Light with Atoms (Einstein 1917) Absorption Spontaneous Emission Stimulated A. Einstein, Physikalische Zeitschrift 18 , 121-128 (1917) September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 5

  7. 16. May 1960 - the first laser Theodore Maiman Inventor of the Ruby Laser (1960) September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 6

  8. Lasers Today Diode laser Dye laser Ti:Sapphire Laser VCSEL NIF, Livermore, California September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 7

  9. Ubiquity of the Laser Material Processing Sources: Wikimedia, NASA, Spiegel, Alsglobal Medicine Astronomy Communication Sensing Microscopy APOD, April 18, 2014 September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 8

  10. Other Technical Developments based on QM knowledge (Examples) Scanning Tunneling Semiconductors CCD/CMOS Transistor Microscope and Devices Sources: Wikimedia, bgr.com CD-ROM MRI Ferromagnetism and Ferrofluids Superconductivity September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 9

  11. Basics of Quantum Mechanics § Many parameters are quantized § photons, energy states, angular momentum, spin § Measurement influences system § eigenstate of an measurement § Probabilistic Interpretation (!) § Results of measurements cannot be predicted, only probabilities for outcomes § Uncertainty relation § Non-commuting operators cannot be simultaneously measured with arbitrarily high accuracy § Complementarity: Wave-Particle Duality § Unknown Quantum States cannot be copied (No-Cloning Theorem) September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 10

  12. ⇒ ⇒ How do we know it’s correct? Experiments Wave-Particle Duality Double Slit Experiment Source: www.insidescience.org Superposition Schrödinger's Cat ⇒ Einstein-Podolsky-Rosen Paradox Entanglement (Bell Inequalities) September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 11

  13. Historical Overview - why did it take so long? Year Theory Experiment 1935 Reality, Locality, Entanglement 1960 Invention of the Laser 1964 Bell's Inequality 1972 First Bell-Experiment 1975 Cooling of Ions 1982 Simulation of Quantum Systems No-Cloning Theorem 1983 Laser Cooling of Atoms 1984 BB84-Protocol (Complementarity) 1985 1st Quantum Algorithm One-Atom Maser 1989 GHZ States 1991 Ekert-Protocol (Entanglement) 1993 Quantum-Teleportation (Entanglement) Quantum Cryptography 1994 Shors Factorization Algorithm 1995 Quantum Computer (Cirac, Zoller) Bose-Einstein-Condensation Entangled Photons, Quantum Logic with Ions 1996 Grovers Quantum Algorithm Entangled States (Ions and QED) Error correcting quantum codes 1997 Quantum Teleportation September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 12 2001 Quantum Computer (7-bit, Factorisation of 15)

  14. Year Theory Experiment 1935 Reality, Locality, Entanglement Historical Overview - why did it take so long? 1960 Invention of the Laser 1964 Bell's Inequality 1972 First Bell-Experiment 1975 Cooling of Ions 1982 Simulation of Quantum Systems No-Cloning Theorem 1983 Laser Cooling of Atoms 1984 BB84-Protocol (Complementarity) 1985 1st Quantum Algorithm One-Atom Maser 1989 GHZ States 1991 Ekert-Protocol (Entanglement) 1993 Quantum-Teleportation (Entanglement) Quantum Cryptography 1994 Shors Factorization Algorithm 1995 Quantum Computer (Cirac, Zoller) Bose-Einstein-Condensation Entangled Photons, Quantum Logic with Ions 1996 Grovers Quantum Algorithm Entangled States (Ions and QED) Error correcting quantum codes 1997 Quantum Teleportation 2001 Quantum Computer (7-bit, Factorisation of 15) 2015 Definitive Test of Bell inequalities September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 12

  15. ... back to the future (actually today) Quantum Information Processing Quantum Communication Quantum Teleportation Quantum Computing Quantum Key Distribution September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 13

  16. ... back to the future (actually today) Quantum Information Processing Quantum Computing Quantum Key Distribution ? Basic Ingredients: Superposition + Entanglement + Interference + No-Cloning September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 14

  17. What, if we find a different theory? Quantum Mechanics and its predictions must be a part of it. Just like Newtonian mechanics is part of the theory of special relativity in the limit of small velocities. September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 15

  18. Quantum Key Distribution Cryptography asymmetric key symmetric key Bob Alice Information theoretical Security: Vernam One-Time-Pad Alice Bob random one time use Quantum Channel length of message Security proofs exist for most protocols N. Gisin, G. Ribordy, W. Tittel and H. Zbinden, Rev. Mod. Phys 74 (2002) 145 September 2019 | Thomas Walther | Laser and Quantum Optics | TU Darmstadt | � 16

Download Presentation
Download Policy: The content available on the website is offered to you 'AS IS' for your personal information and use only. It cannot be commercialized, licensed, or distributed on other websites without prior consent from the author. To download a presentation, simply click this link. If you encounter any difficulties during the download process, it's possible that the publisher has removed the file from their server.

Recommend

New developments in the quantum ESPRESSO software distribution for quantum simulations at the

New developments in the quantum ESPRESSO software distribution for quantum simulations at the

New developments in the quantum ESPRESSO software distribution for quantum simulations at the nanoscale Paolo Giannozzi Universit` a di Udine, Italy Workshop From experiments to theory & models... Roma Tor Vergata, 2017/12/5 Typeset by

805 views • 35 slides
Tutorial: Security of quantum key distribution: approach from complementarity Univ. of Tokyo

Tutorial: Security of quantum key distribution: approach from complementarity Univ. of Tokyo

QCrypt2020: Aug. 12, 2020 Tutorial: Security of quantum key distribution: approach from complementarity Univ. of Tokyo Masato Koashi Quantum key distribution (QKD) Public communication Weak light pulses signals measurement Eve tests Bob

1.22k views • 95 slides
Semi-Quantum Key Distribution with Limited Measurement Capabilities Walter O. Krawec Computer

Semi-Quantum Key Distribution with Limited Measurement Capabilities Walter O. Krawec Computer

Semi-Quantum Key Distribution with Limited Measurement Capabilities Walter O. Krawec Computer Science & Engineering Department University of Connecticut Storrs, CT USA Email: walter.krawec@gmail.com ISITA 2018 Quantum Key Distribution

450 views • 43 slides
distribution and beyond Eleni Diamanti LIP6, CNRS, Sorbonne Universit Paris Centre for Quantum

distribution and beyond Eleni Diamanti LIP6, CNRS, Sorbonne Universit Paris Centre for Quantum

Practical aspects of quantum key distribution and beyond Eleni Diamanti LIP6, CNRS, Sorbonne Universit Paris Centre for Quantum Computing QCrypt, 10-14 August 2020 Quantum communication networks 2 Photonic resources Encoding in properties

632 views • 31 slides
A 2-categorical Analysis of Complementary Families and Quantum Key Distribution Krzysztof Bar 1

A 2-categorical Analysis of Complementary Families and Quantum Key Distribution Krzysztof Bar 1

A 2-categorical Analysis of Complementary Families and Quantum Key Distribution Krzysztof Bar 1 Jamie Vicary 2 1 Department of Computer Science, University of Oxford 2 Centre for Quantum Technologies, National University of Singapore and

415 views • 38 slides
Device Independent Quantum Key Distribution using Three-Party Pseudo-Telepathy Jyotirmoy Basak,

Device Independent Quantum Key Distribution using Three-Party Pseudo-Telepathy Jyotirmoy Basak,

Device Independent Quantum Key Distribution using Three-Party Pseudo-Telepathy Jyotirmoy Basak, Arpita Maitra and Subhamoy Maitra Indian Statistical Institute & C R Rao AIMSCS December 18, 2019 Device Independent Quantum Key Distribution

536 views • 28 slides
Quantum Cryptography Mris Ozols University of Cambridge Overview What are quantum

Quantum Cryptography Mris Ozols University of Cambridge Overview What are quantum

Quantum Cryptography Mris Ozols University of Cambridge Overview What are quantum computers? What is quantum cryptography? - Shor's algorithm for factoring - Quantum key distribution - Device-independent quantum cryptography What

630 views • 34 slides
Security proof of practical quantum key distribution with detection-efficiency mismatch Yanbao

Security proof of practical quantum key distribution with detection-efficiency mismatch Yanbao

Security proof of practical quantum key distribution with detection-efficiency mismatch Yanbao Zhang NTT Research Center for Theoretical Quantum Physics NTT Basic Research Lab, Japan Based on the joint work arXiv:2004.04383 with Patrick J.

349 views • 20 slides
Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending Yang Liu Jinan

Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending Yang Liu Jinan

Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending Yang Liu Jinan Institute of Quantum Technology (JIQT) University of Science and Technology of China (USTC) QCRYPT 2020 Twin-Field QKD (TF-QKD) Proposed in 2018,

841 views • 45 slides
Generalized Approach for Analysing Quantum Key Distribution Experiments Arpita Maitra and Suvra

Generalized Approach for Analysing Quantum Key Distribution Experiments Arpita Maitra and Suvra

Generalized Approach for Analysing Quantum Key Distribution Experiments Arpita Maitra and Suvra Sekhar Das C R Rao AIMSCS & Indian Institute of Technology Kharagpur December 18, 2019 Generalized Approach for Analysing Quantum Key

497 views • 28 slides
Quantum Key Distribution (QKD) Prashanta Kharel Applied Physics Seminar November 2012 Friday,

Quantum Key Distribution (QKD) Prashanta Kharel Applied Physics Seminar November 2012 Friday,

Quantum Key Distribution (QKD) Prashanta Kharel Applied Physics Seminar November 2012 Friday, December 7, 12 Friday, December 7, 12 Messag Classical Key Distribution RSA Encryption Message: SEAS 01000101 e d Relies on two

564 views • 10 slides
Quantum Lecture 11 The classical wiretap channel The quantum wiretap channel Quantum

Quantum Lecture 11 The classical wiretap channel The quantum wiretap channel Quantum

Quantum Lecture 11 The classical wiretap channel The quantum wiretap channel Quantum key distribution Mikael Skoglund, Quantum Info 1/16 The Classical Wiretap Channel The degraded wiretap channel p ( y | x ) X n Y n W W

422 views • 8 slides
Distribution testing in the 21 1/2 th century Ryan ODonnell Carnegie Mellon University based

Distribution testing in the 21 1/2 th century Ryan ODonnell Carnegie Mellon University based

Distribution testing in the 21 1/2 th century Ryan ODonnell Carnegie Mellon University based on joint work with Costin Bdescu (CMU) & John Wright (MIT) Slide 1, in which I get defensive Quantum. Why should you care? Quantum

888 views • 59 slides
Quantum Cryptography Lecture 28 Quantum Cryptography Quantum Cryptography Quantum information:

Quantum Cryptography Lecture 28 Quantum Cryptography Quantum Cryptography Quantum information:

Quantum Cryptography Lecture 28 Quantum Cryptography Quantum Cryptography Quantum information: Using microscopic physical state of quantum systems (spin of atoms/sub-atomic particles, polarization of photons etc.) to encode information

1.95k views • 154 slides
Spontaneous quantum measurement of mass distribution: DP and CSL models Lajos Disi Wigner

Spontaneous quantum measurement of mass distribution: DP and CSL models Lajos Disi Wigner

Spontaneous quantum measurement of mass distribution: DP and CSL models Lajos Disi Wigner Research Centre for Physics H-1525 Budapest 114, POB 49, Hungary Two models in single nutshell Spontaneous Localization is not testable CSL (DP, too)

418 views • 10 slides
Quantum Computing in Cryptography MATH318/CPSC418 April 15, 2020 Topics: 1. Qubits: why

Quantum Computing in Cryptography MATH318/CPSC418 April 15, 2020 Topics: 1. Qubits: why

Quantum Computing in Cryptography MATH318/CPSC418 April 15, 2020 Topics: 1. Qubits: why quantum? 2. Shors algorithm and the DLP 3. Quantum Key Distribution and BB84 4. More directions in quantum cryptography 5. Resources: more directions

479 views • 33 slides
Blips on the Radar Screen: The Case for Sustained Stability in New Subsea Systems Development

Blips on the Radar Screen: The Case for Sustained Stability in New Subsea Systems Development

Blips on the Radar Screen: The Case for Sustained Stability in New Subsea Systems Development Market Thomas A. Soja, John Manock, S. Hansen Long T Soja & Associates, Inc. Boston, MA USA Presenter Profile Tom Soja is an international

488 views • 15 slides
Quantum systems and Fermilab Joe Lykken PAC Meeting, July 2017 Quantum Information Science (QIS)

Quantum systems and Fermilab Joe Lykken PAC Meeting, July 2017 Quantum Information Science (QIS)

Quantum systems and Fermilab Joe Lykken PAC Meeting, July 2017 Quantum Information Science (QIS) QIS identified as a national (interagency) and Office of Science priority HEP QIS emphasis (both near-term and long-term) is on: P5

494 views • 15 slides
David Elkouss Towards long distance quantum communications Where are we? State of the art with

David Elkouss Towards long distance quantum communications Where are we? State of the art with

David Elkouss Towards long distance quantum communications Where are we? State of the art with fiber optics Quantum Cryptography (QKD) non DI: Key Distribution Status: Commercial at short (~100kms) distances (idQuantique, Huawei,

460 views • 12 slides
Ethernet The LAN Killer (C) Herbert Haas 2005/03/11 Ethernet works in Robert Metcalfe

Ethernet The LAN Killer (C) Herbert Haas 2005/03/11 Ethernet works in Robert Metcalfe

Ethernet The LAN Killer (C) Herbert Haas 2005/03/11 Ethernet works in Robert Metcalfe practice but not in theory. History (1) Late 1960s: Aloha protocol University of Hawaii Late 1972: Robert Metcalfe developed first Ethernet

937 views • 67 slides
Magnetars in the Fermi Era On behalf of the Fermi /GBM Magnetar Team C. Kouveliotou (PI,

Magnetars in the Fermi Era On behalf of the Fermi /GBM Magnetar Team C. Kouveliotou (PI,

Magnetars in the Fermi Era On behalf of the Fermi /GBM Magnetar Team C. Kouveliotou (PI, NASA/MSFC) E. Gogus, Y. Kaneko (Sabanci University, Turkey) E. Ramirez-Ruiz (UCSC, USA) J. Granot (University of Hertfordshire, UK) P. Woods (Dynetics,

514 views • 36 slides
Photonics with Electronics for Opto- Electronic Networks-on-Chip Modeling Chen Sun , Chia-Hsin Owen

Photonics with Electronics for Opto- Electronic Networks-on-Chip Modeling Chen Sun , Chia-Hsin Owen

DSENT A Tool Connecting Emerging Photonics with Electronics for Opto- Electronic Networks-on-Chip Modeling Chen Sun , Chia-Hsin Owen Chen, George Kurian, Lan Wei, Jason Miller, Anant Agarwal, Li-Shiuan Peh, Vladimir Stojanovic 5/19/2012 1

1.36k views • 96 slides
Outline Introduction Object-Relationship-Attribute (ORA) Semantics in ER Model

Outline Introduction Object-Relationship-Attribute (ORA) Semantics in ER Model

Improving the Correctness of Some Database Research using ORA-Semantics Tok Wang Ling, Zhong Zeng, Mong Li Lee, Thuy Ngoc Le National University of Singapore ER 2016, Gifu, Japan Outline Introduction Object-Relationship-Attribute (ORA)

2k views • 132 slides
Obtaining Adjustable Regularization for Free via Iterate Averaging Jingfeng Wu , Vladimir

Obtaining Adjustable Regularization for Free via Iterate Averaging Jingfeng Wu , Vladimir

Obtaining Adjustable Regularization for Free via Iterate Averaging Jingfeng Wu , Vladimir Braverman, Lin F. Yang Johns Hopkins University & UCLA June 2020 <latexit

804 views • 12 slides

More recommend